# Constella Identity Fraud Detection API vs Proofpoint Identity Threat Defense: side-by-side comparison (2026) [Constella Identity Fraud Detection API](https://cybersectools.com/tools/constella-identity-fraud-detection-api) is a commercial [identity threat detection and response](https://cybersectools.com/categories/itdr) solution by [Constella Intelligence](https://cybersectools.com/companies/constella-intelligence). [Proofpoint Identity Threat Defense](https://cybersectools.com/tools/proofpoint-identity-threat-defense) is a commercial [identity threat detection and response](https://cybersectools.com/categories/itdr) solution by [Proofpoint](https://cybersectools.com/companies/proofpoint). Features, integrations, deployment and the company behind each one, side by side. ## Our take What our shortlists say about the one we picked. ### [Proofpoint Identity Threat Defense](https://cybersectools.com/tools/proofpoint-identity-threat-defense) Best for: Companies wanting to find and close attack paths Proofpoint earns its spot for teams that want to shrink the attack surface first, because it shows the shortest routes to your critical assets and helps close them. Its decoys need no agents, which keeps rollout light. It is built for mid-size and large Microsoft estates, so check coverage if you also run another identity provider. From [Best ITDR Solutions for Business](https://cybersectools.com/shortlists/best-itdr-solutions), Fall 2026. Reviewed by [Nika (Nikoloz) Kokhreidze](https://cybersectools.com/about). Need the answer fast? [Best ITDR Solutions for Business](https://cybersectools.com/shortlists/best-itdr-solutions) picks Microsoft Defender for Identity, CrowdStrike Falcon Next-Gen Identity Security, SentinelOne Singularity Identity Security and 4 more. ## Side-by-side comparison | | Constella Identity Fraud Detection API | Proofpoint Identity Threat Defense | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Identity Threat Detection and Response | Identity Threat Detection and Response | | Verified | No | No | | Deployment type | Cloud | Cloud | | Company size fit | SMB, Mid-Market, Enterprise | Mid-Market, Enterprise | | Company | Constella Intelligence | Proofpoint | | Headquarters | – | – | ### Use cases and capabilities | | Constella Identity Fraud Detection API | Proofpoint Identity Threat Defense | |---|---|---| | Fraud Detection | Yes | – | | Authentication | – | Yes | ### Core features **Constella Identity Fraud Detection API** 9 features listed. Sign in on the page to see them. **Proofpoint Identity Threat Defense** 9 features listed. Sign in on the page to see them. ### Integrations **Constella Identity Fraud Detection API** No integrations listed. **Proofpoint Identity Threat Defense** 4 integrations listed. Sign in on the page to see them. ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [Constella Identity Fraud Detection API](https://cybersectools.com/tools/constella-identity-fraud-detection-api) fits if you are a small business. ## Constella Identity Fraud Detection API vs Proofpoint Identity Threat Defense FAQ Common questions when comparing Constella Identity Fraud Detection API vs Proofpoint Identity Threat Defense for identity threat detection and response. ### What is the difference between Constella Identity Fraud Detection API and Proofpoint Identity Threat Defense? **Constella Identity Fraud Detection API**: API-based identity fraud detection using breach & infostealer intelligence. Built by Constella Intelligence. **Proofpoint Identity Threat Defense**: Identity threat detection and response solution for account protection. Built by Proofpoint. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Constella Identity Fraud Detection API and Proofpoint Identity Threat Defense? **Constella Identity Fraud Detection API** is made by Constella Intelligence. **Proofpoint Identity Threat Defense** is made by Proofpoint. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is Constella Identity Fraud Detection API a good alternative to Proofpoint Identity Threat Defense? Often, yes. Constella Identity Fraud Detection API and Proofpoint Identity Threat Defense are both Identity Threat Detection and Response products. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Constella Identity Fraud Detection API vs Silverfort Identity Threat Detection & Response (ITDR)](https://cybersectools.com/compare/constella-identity-fraud-detection-api-vs-silverfort-identity-threat-detection-and-response-itdr) - [Constella Identity Fraud Detection API vs Qevlar AI Identity](https://cybersectools.com/compare/constella-identity-fraud-detection-api-vs-qevlar-ai-identity) - [Constella Identity Fraud Detection API vs Orchid Security](https://cybersectools.com/compare/constella-identity-fraud-detection-api-vs-orchid-security) - [Proofpoint Identity Threat Defense vs Silverfort Identity Threat Detection & Response (ITDR)](https://cybersectools.com/compare/proofpoint-identity-threat-defense-vs-silverfort-identity-threat-detection-and-response-itdr) - [Proofpoint Identity Threat Defense vs Qevlar AI Identity](https://cybersectools.com/compare/proofpoint-identity-threat-defense-vs-qevlar-ai-identity) - [Proofpoint Identity Threat Defense vs Orchid Security](https://cybersectools.com/compare/orchid-security-vs-proofpoint-identity-threat-defense) ## Alternatives to each - [See all Constella Identity Fraud Detection API alternatives](https://cybersectools.com/alternatives/constella-identity-fraud-detection-api) - [See all Proofpoint Identity Threat Defense alternatives](https://cybersectools.com/alternatives/proofpoint-identity-threat-defense) --- Source: https://cybersectools.com/compare/constella-identity-fraud-detection-api-vs-proofpoint-identity-threat-defense For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/constella-identity-fraud-detection-api.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Constella Identity Fraud Detection API and Proofpoint Identity Threat Defense: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md